code: def _outer_update(self, **kwargs):
      raise NotImplementedError()
  
file_path: avalanche/avalanche/training/templates/update_type/meta_update.py
imports: from avalanche.training.templates.strategy_mixin_protocol import MetaLearningStrategyProtocol
  from avalanche.training.utils import trigger_plugins
label_desc: Use image node_id 6 for calling the MetaUpdate obj's underlying member method code with example usage: obj._outer_update() without return types